"These socialists are so confused, and their messaging is getting worse by the minute. They seem to think that cows and airplanes are a threat to our future," he added. "Sounds to me like they have been infected by Mad Cow Disease!"

Abramoff was jailed for several years after pleading guilty in 2006 to fraud, tax evasion and conspiracy to bribe public officials. The charges stemmed in part from Abramoff overbilling Native American tribes he had as clients.